Facebook Zombie
A Facebook group member who doesn't do anything. They just wander around the group like a dead person, clicking on memes and then walking away like they're not even there.
'I saw a meme. I didn't like it. I just stared at it for five minutes.'
'I clicked on a meme. I stared at it. I left.'
'I was in a group. I didn't like anything. I didn't comment. I didn't share. I just stared at the screen.'